Regulations on Import and Export of Endangered Species of Wild Fauna, Flora and Related Products Article 21

The CITES certificate and other permits have a validity of no more than six (6) months, counting from the date of issuance, and hold a restriction of one-time export and import. However for certain specific goods, a certificate or permit of shorter validity length can be issued.
中文原文 瀕臨絕種動植物及其產製品輸出入管理辦法第21條
華盛頓公約許可證或其他證明書有效期限為自核發之日起六個月,並限一次輸出入。
但對特定貨品,得核發有效期限較短之許可證或證明書。

English translation for reference only; the Chinese text prevails. Not legal advice.